In their forthcoming book, “It’s the Middle Class, Stupid!” Democratic strategists James Carville and Stan Greenberg lay out both a harsh critique of Republican fiscal policies and a groundwork for Democratic economic proposals and, as you might expect, it’s Carville who comes out swinging with some of the most colorful language. “It’s the Middle Class, Stupid!” hits bookshelves on July 10 and here are the book’s best quotes.